SiUS39-602 Special Control
Function 49
3.1.2 Startup Control in Heating Operation
Note: ON at starting immediately after power is on.
Actuator
Pressure equalization
before start-up
Starting control
Step1 Step2
Compressor OFF 52Hz + OFF 52Hz + OFF
Outdoor unit fan STEP 4 STEP 7 STEP 7
Four way valve 1 ON ON ON
Four way valve 2 Hold Hold OFF
Main motorized valve (EV1) 0 pls 180 pls 180 pls
Sub motorized valve (EV2) 0 pls 0 pls 1000 pls
Sub-cooling motorized valve (EV3) 0 pls 0 pls 0 pls
Hot gas bypass valve (SVP) OFF ON ON
Oil equalization valve (SVO) OFF OFF OFF
Receiver gas charging valve (SVL) OFF ON ON → OFF
Receiver gas discharge valve (SVG) OFF OFF OFF → ON
Discharge pipe stop valve (SVR) Hold ON OFF → ON
Non-operating unit liquid pipe stop
valve (SVSL)
ON ON ON
High pressure gas pipe pressure
reduction valve (SVC)
Hold
*Note
OFF OFF
Ending conditions 1 min. 5 sec.
• 230 sec.
• Pc - Pe > 58 psi
or
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